Viscoelastic Damper, is the use of viscoelastic materials can absorb vibration damper, divided into rotational and translational type two kinds. Rotation type, Viscoelastic Damper installed on the structure of the beam to the corner, the use of Angle between the beam Angle deformation and energy dissipation. Depending on the type of installation, the translation type is divided into sprag type and wall plate type two kinds.